And Refinery29 noted that her eyes look different depending on the event.

At an informal roundtable discussion with female business leaders and Prime Minister Justin Trudeau in February, her eyes were brown.

Canadian Prime Minister Justin Trudeau speaks alongside Ivanka Trump during a roundtable discussion on women entrepreneurs and business leaders in the White House in Washington, DC, February 13. (Photo: Saul Loeb/AFP/Getty Images)

But during her Republican National Convention speech last summer, a more high-profile event, they looked green.

Ivanka Trump speaks on the last day of the Republican National Convention on July 21, 2016, in Cleveland, Ohio. (Photo: Jim Watson/AFP/Getty Images)

It also looks like she slipped in the green contacts for an interview with "CBS This Morning" earlier this month.

We may never know her strategy for changing up the colour, if there is one at all, but it's definitely an interesting fashion choice for an adviser to the President of the United States.